DOI: 10.3724/SP.J.1105.2013.12395

Acta Polymerica Sinica (高分子学报) 2013/013:9 PP.1159-1164


arbon encapsulated nickel (Ni@C) nanoparticles were synthesized via one step reducing flame spray pyrolysis approach and mixed with HDPE to prepare polymer based positive temperature coefficient (PTC) conductive composites. The as-prepared Ni@C nanoparticles possessed a core/shell structure with carbon shell located outside and nickel core located inside.The mean size of Ni@C nanoparticles was 30~50 nm,and the carbon shell was about 2.9 nm in thickness.The carbon content of Ni@C was about 3.4% calculated from TG analysis.The existence of carbon shell has significantly prevented the agglomeration of metallic nickel particles.Investigations of composite structure were carried by using an optical microscope on slides of composites and section SEM analysis.Results showed the Ni@C had a good spatial distribution in the HDPE matrix,and the PTC conductive composite performed a low percolation threshold of 10 wt% and a high PTC intensity of 8 in magnitude.

Key words:Flame spray pyrolysis, Ni@C, PTC performance

ReleaseDate:2014-07-21 16:51:13

1 Dang Z M,Nan C W.Ceramics Inter,2005,31:349~351

2 Srivastava S,Tchoudakov R,Narkis M.Polym Eng Sci,2000,40:1522~1528

3 Narkis M,Srivastava S,Tchoudakov R,Breuer O.Synth Met,2000,113(1-2):29~34

4 Tchoudakov R,Narkis M.Polym Eng Sci,2004,44(3):528~540

5 Luo Y,Li Y,Li Z.Smart Mater Struct,2006,15(6):1979~1985

6 Feller J F.J Appl Polym Sci,2004,91(4):2151~2157

7 Mamunya Y P,Muzychenko Y V,Lebedev E V.Polym Eng Sci,2007,47(1):34~42

8 Liu Jing(刘静),Pan Yi(潘颐),Zhang Xiangwu(张向武).Acta Materiae Compositae Sinica(复合材料学报),2002,19(6):116~119

9 Zhang B,Fu R W,Zhang M Q,Dong X M,Lan P L.Sensors Actuators B,2005,109(2):323~328

10 Grunlan J C,Kim Y S,Ziaee S,Wei X,Abdel-Magid B.Macromol Mater Eng,2006,291(9):1035~1043

11 Athanassiou E K,Grass R N,Stark W J.Nanotechnology,2006,17(6):1668~1673

12 Li Y F,Hu Y J,Huo J C,Li C Z.Ind Eng Chem Res,2012,51(34):11157~11162

13 Jin Xinying(金新颖),Wang Bingxi(王炳喜),Chen Dongyang(陈栋阳).Journal of functional polymer(功能高分子学报),2007,19-20(2):133~142

14 Jia Shaojin(贾少晋),Xu Zhongting(徐忠庭),Zhang Zhicheng(张志成).Journal of functional polymer(功能高分子学报),2003,16(4):545~552

15 Shen L,Wang F Q,Yang H,Meng Q R.Polymer Testing,2011,30:442~448

16 Jeon J,Lee H B R,Bao Z N.Adv Mater,2013,25:850~855

17 Balazs A C,Emrick T,Russell T P.Science,2006,314:1107~1110

18 Luechinger N A,Booth N,Stark W J.Adv Mater,2008,20:3044~3049